import 'package:flutter/material.dart';
import 'package:flutter_boost/flutter_boost.dart';

class MyHomePage extends StatefulWidget {
  const MyHomePage({Key? key, required this.params, required this.uniqueId})
      : super(key: key);

  final Map params;
  final String uniqueId;

  // This widget is the home page of your application. It is stateful, meaning
  // that it has a State object (defined below) that contains fields that affect
  // how it looks.

  // This class is the configuration for the state. It holds the values (in this
  // case the title) provided by the parent (in this case the App widget) and
  // used by the build method of the State. Fields in a Widget subclass are
  // always marked "final".

  @override
  State<MyHomePage> createState() => _MyHomePageState();
}

class _MyHomePageState extends State<MyHomePage> {
  int _counter = 0;

  ///声明一个用来存回调的对象
  VoidCallback? removeListener;

  void _incrementCounter() {
    setState(() {
      // This call to setState tells the Flutter framework that something has
      // changed in this State, which causes it to rerun the build method below
      // so that the display can reflect the updated values. If we changed
      // _counter without calling setState(), then the build method would not be
      // called again, and so nothing would appear to happen.
      _counter++;
    });
  }

  @override
  void initState() {
    ///添加事件响应者,监听native发往flutter端的事件
    removeListener = BoostChannel.instance.addEventListener("eventToFlutter",
        (key, arguments) {
      print("收到消息: $key  $arguments");
      return;
    });
    super.initState();
  }

  @override
  void dispose() {
    //移除监听者
    removeListener?.call();
    super.dispose();
  }

  @override
  Widget build(BuildContext context) {
    // This method is rerun every time setState is called, for instance as done
    // by the _incrementCounter method above.
    //
    // The Flutter framework has been optimized to make rerunning build methods
    // fast, so that you can just rebuild anything that needs updating rather
    // than having to individually change instances of widgets.
    return Scaffold(
      appBar: AppBar(
        // Here we take the value from the MyHomePage object that was created by
        // the App.build method, and use it to set our appbar title.
        title: Text("flutter页面"),
      ),
      body: Center(
        // Center is a layout widget. It takes a single child and positions it
        // in the middle of the parent.
        child: Column(
          // Column is also a layout widget. It takes a list of children and
          // arranges them vertically. By default, it sizes itself to fit its
          // children horizontally, and tries to be as tall as its parent.
          //
          // Invoke "debug painting" (press "p" in the console, choose the
          // "Toggle Debug Paint" action from the Flutter Inspector in Android
          // Studio, or the "Toggle Debug Paint" command in Visual Studio Code)
          // to see the wireframe for each widget.
          //
          // Column has various properties to control how it sizes itself and
          // how it positions its children. Here we use mainAxisAlignment to
          // center the children vertically; the main axis here is the vertical
          // axis because Columns are vertical (the cross axis would be
          // horizontal).
          mainAxisAlignment: MainAxisAlignment.center,
          children: <Widget>[
            const Text(
              'You have pushed the button this many times:',
            ),
            Text(
              '$_counter',
              style: Theme.of(context).textTheme.headline4,
            ),
            const Text('原生传来的数据'),
            const SizedBox(height: 10),
            Text(
              widget.params.toString(),
            ),
            MaterialButton(
                child: const Text(
                  "打开原生页面",
                  style: TextStyle(color: Colors.white),
                ),
                onPressed: () {
                  BoostNavigator.instance.push("native页面", arguments: {
                    "name": "农信",
                    "content": "测试数据"
                  }).then((value) => print("return:${value?.toString()}"));
                },
                color: Colors.blue),
            MaterialButton(
                child: const Text(
                  "给原生发消息",
                  style: TextStyle(color: Colors.white),
                ),
                onPressed: () {
                  BoostChannel.instance
                      .sendEventToNative("nativeEvent", {"key1": "value1"});
                },
                color: Colors.blue),
            MaterialButton(
                child: const Text(
                  "打开flutter页面",
                  style: TextStyle(color: Colors.white),
                ),
                onPressed: () {
                  BoostNavigator.instance.push("pageOne", arguments: {
                    "name": "农信1",
                    "content": "测试数据"
                  }).then((value) => print("return:${value?.toString()}"));
                },
                color: Colors.blue),
          ],
        ),
      ),
      floatingActionButton: FloatingActionButton(
        onPressed: _incrementCounter,
        tooltip: 'Increment',
        child: const Icon(Icons.add),
      ), // This trailing comma makes auto-formatting nicer for build methods.
    );
  }
}
